Improved shank-laster



Uwrrnn rares PATENT Clinica.

WARD N. FLAGG, OF BOYLSTON, MASSACHUSETTS.

IMPRovED sHANK-LAsTl-:a

Specification forming part of Letters Patent No. 52,2S0, dated January 30, 1866.

To all whom t may concern:

Be it known that I, WARD N. FLAGG, of Boylston, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Shank-Lasters; and l do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure l represents a front view' of my improved shank-laster, and Fig. 2 represents a longitudinal central section on line A B, Fig. l, looking' in the direction of the arrow.

InI the drawings, A A are two jaws pivoted at a to in slots in the cross-piece B. The upper ends of these jaws are also pivoted at b b tothe ends oftoggle-levers C C, which, in turn, are pivoted at c c to the parallel piece D.

A screw-shaft, E, having a handle, F, passes down through the pieces B and D. The screwthread on the upper part of shaft E, which passes through D, is cut in a different direction to the thread which passes through the piece B, so that when the shaft E is turned so as to withdraw the lsaine from the piece B it at the same time causes the parallel piece D to rise with the combined velocity of both screw-threads, causing the lower ends ofjaws or levers A A to approach each other, as indicated in red lines, Fig. l.

The lower ends of the arms orjaws A A are provided with points el cl d, and upon the inner sides of each lever A is fastened a long spring, G, provided with points e e c, which point toward the points on its respective lever, A. The springs are fastened atf, and each has a thumb-piece, H, by which they can be easily operated.

The operation of the laster is as follows: The upper is placed upon the last, which is then turned'over, and the upper is then drawn up about the shank, and the edges thereof' placed between points of springs G G and those on the ends oflevers A A. The operator now turns the screw-shaft E so as to cause levers A A to approach each other, as shown in red lines, Fig. l, thereby drawing the edges ot' the upper on the shank of the last in a convenient manner for fastening preparatory to applying the outer sole.

This laster can be applied in a very expeditious manner, and is easily and quickly operated.

The long springs G G, in combination with the points of levers A A, form a very effective means ot holding the edges ofthe upper, much superior in many respects to jaws operated by a screw. The springs G G can be operated independently of each other, and can therefore be adjusted with great ease and rapidity to suit the work in hand.

Having described my improved shank-laster, what I claim therein as new and of my invention, and desire to secure by Letters Patent, 1s-

The combination, with the levers A A, operated as described and having points d d d at their lower ends, of the long springs G G, provided with points e e c, and thumb-pieces H H, as and for the purposes described.

WARD N. FLAGG.

Witnesses:

H. L. FULLER, THos. H. DODGE. 

